	<!--//
	function returnwindow(fenstername){
		var aktuellesfenster = window.name;
		var win = window.open(fenstername, "fenster1", "width=600, height=600, left=40, top=40, dependent=yes, resizable=yes, toolbar=yes, status=no, menubar=no, scrollbars=yes");
		if(aktuellesfenster != "fenster1"){
			if(!win.ontop){
				win.focus();
			}
		}
	}

function checkCustomerForm(){
	if(document.forms['customerinsert'].elements['customer[profession]'].value == "" || 
		document.forms['customerinsert'].elements['customer[name]'].value == "" ||
		document.forms['customerinsert'].elements['customer[forename]'].value == "" ||
		document.forms['customerinsert'].elements['customer[email]'].value == "" ||
		document.forms['customerinsert'].elements['customer[username]'].value == "" ||
		document.forms['customerinsert'].elements['customer[password]'].value == "" ||
		document.forms['customerinsert'].elements['customer[password2]'].value == "" ||
		document.forms['customerinsert'].elements['themes[]'].value == "" ||
		document.forms['customerinsert'].elements['regions[]'].value == "") {
			alert("Bitte füllen Sie alle Felder aus!");
		return false;
	}
	<!--Mail-->
	checkMail(document.forms['customerinsert'].elements['customer[email]'].value);
	<!--Username-->
	checkValue(document.forms['customerinsert'].elements['customer[username]'].value, 5);
	<!--PW-->
	if(document.forms['customerinsert'].elements['customer[password]'].value != document.forms['customerinsert'].elements['customer[password2]'].value) alert("Passwort und Passwortwdh. stimmen nicht überein!");
	checkValue(document.forms['customerinsert'].elements['customer[password]'].value, 6);
}
function checkCustomerUpdateForm(){
		if(document.forms['customerupdate'].elements['customer[profession]'].value == "" || 
			document.forms['customerupdate'].elements['customer[name]'].value == "" ||
			document.forms['customerupdate'].elements['customer[forename]'].value == "" ||
			document.forms['customerupdate'].elements['customer[email]'].value == "" ||
			document.forms['customerupdate'].elements['themes[]'].value == "" ||
			document.forms['customerupdate'].elements['regions[]'].value == "") {
				alert("Bitte füllen Sie alle Felder aus!");
			return false;
		}
		<!--Mail-->
		checkMail(document.forms['customerupdate'].elements['customer[email]'].value);
}
function checkValue(value, input){
	var check = value;
	var element = input;
	reg_ex_value=/^(?![0-9]{6})[0-9a-zA-Z]{6,12}$/;
	pruef_value=reg_ex_value.test(check);
	if(!pruef_value){
		alert("Bitte mind. sechs Zeichen defnieren! Benutzername und Passwort dürfen keine Sonderzeichen enthalten, d.h. nur Aa-Zz ohne Umlaute und 0-9!");
		document.forms['customerinsert'].elements['customer[username]'].value = "";
	}
}
function checkMail(str){
	var a = false;
	var res = false;
	if(typeof(RegExp) == 'function'){
		var b = new RegExp('abc');
		if(b.test('abc') == true){
			a = true;
		}
	}
	if(a == true){
		reg = new RegExp('^([a-zA-Z0-9\\-\\.\\_]+)'+
                   '(\\@)([a-zA-Z0-9\\-\\.]+)'+
                   '(\\.)([a-zA-Z]{2,4})$');
  		res = (reg.test(str));
	}
		else{
			res = (str.search('@') >= 1 &&
			str.lastIndexOf('.') > str.search('@') &&
			str.lastIndexOf('.') >= str.length-5)
		}
	if(res == false) alert("Bitte eine gültige E-Mail-Adresse eingeben!");
} 
function selRegions(action){
	var length = document.forms['customerupdate'].elements['regions[]'].options.length;
	for(var i = 0; i < length; i++) {
		if(action=="ja"){
			document.forms['customerupdate'].elements['regions[]'].options[i].selected = true;
		}
			else{
				document.forms['customerupdate'].elements['regions[]'].options[i].selected = false;
			}
	}
}
function selThemes(action){
	var length = document.forms['customerupdate'].elements['themes[]'].options.length;
	for(var i = 0; i < length; i++) {
		if(action=="ja"){
			document.forms['customerupdate'].elements['themes[]'].options[i].selected = true;
		}
			else{
				document.forms['customerupdate'].elements['themes[]'].options[i].selected = false;
			}
	}
}
//-->